I've lived all over the states and Houston is a great place for the "hobby."  If you want asian girls, check out the spas.  There are a few good ones that I've gone to, although never got around to reviewing here.  I like some of the spas near 1960 and I-45 such as Good Times and Green Haven, but if you aren't up north they are inconvenient.  There are a few hidden ones off of Star Lane near the Galleria, of which I can vouch for Paradise Spa although the last time I went it there wasn't as good of quality as there used to be.  There are some on the West side of 1960 as well but I haven't been to any of them yet, and there are asian spas around Chinatown off Bellaire that some guys have had good luck with.

You arrived to Houston at a potentially bad time though.  There was just a big bust of an escort service, strip clubs have been targeted repeatedly, and as a result many of the ladies are either keeping tabs on their customers or requiring potentially intrusive screening for their own safety.  Still, apparently signing  up for P411 helps with the latter part, and the former is solved by visiting spas or using a "hobby phone" to contact them instead of your real number.